Q. 273.9( 26 Votes )

For any two sets

Answer :

For any sets A and B we have De morgans law


(A B)’ =A’ B’ , (A B)’ = A’ B’


=A – (A–B)


= A (A–B)’


= A(AB’)’


= A(A’ B’)’)


= A (A’B)


= (A A’) (A B)


= ϕ (A B)


= (A B)

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